body,
p,
h1,
h2,
h3,
h4,
h5,
h6,
ul,
ol,
dl,
li,
dt,
dd {
  /* 默认有边距，都要清除 */
  margin: 0;
  padding: 0;
  /*字体设置*/
  font-size: 16px;
  font-family: 'Microsoft Yahei', sans-serif;
  /* 去掉列表的原点 */
  list-style: none;
  /* 默认鼠标 */
  cursor: default;
}
*{
  box-sizing: border-box ;
  border:0;
}

/*可选*/

/*行内块元素*/
input,
img {
  margin: 0;
  padding: 0;
  border: 0 none;
  outline-style: none;
  vertical-align: bottom;
}
img {
  display: block;
}
input,button{
  outline: none;;
}

/*行内元素*/
a,
a:active,
a:visited {
  /*下划线和颜色*/
  color: black;
  text-decoration: none;
}

textarea {
  /* 边框清零 */
  border: none;
  /* 轮廓线清零 */
  outline: none;
  /* 防止文本域被随意拖拽 */
  resize: none;
}
i {
  /*文字样式*/
  font-style: normal;
}

table {
  /*边框合并*/
  border-collapse: collapse;
  border-spacing: 0;
}

/* 使用伪元素清除浮动 */
.clear::after {
  content: '';
  height: 0;
  overflow: hidden;
  display: block;
  visibility: hidden;
  clear: both;
}

.clear {
  *zoom: 1;
}
input::-webkit-input-placeholder { 
  /* WebKit browsers */ 
  color: #c5c5c5; 
  } 
  input:-moz-placeholder { 
  /* Mozilla Firefox 4 to 18 */ 
  color: #c5c5c5; 
  } 
  input::-moz-placeholder { 
  /* Mozilla Firefox 19+ */ 
  color: #c5c5c5; 
  } 
  input:-ms-input-placeholder { 
  /* Internet Explorer 10+ */ 
  color: #c5c5c5; 
  }


  
